How Can I Add .CLP Files to my NetBeans Project?

I am trying to embed Jess in my Java code developed using NetBeans IDE 6.5.
I inlcuded the statement import jess.*; in my Java code so as to make the library available. When I ran the program, it gave an error message that the file containing the rule in JessML (.CLP file) could not be opened. Please, how can I solve this problem. I already included jess.jar file in the classpath.